I just assumed the EFC's for that code were the same for all OFA remotes. I'm using a URC-8305.
I've been in touch with the OFA people and they sent me an updated list of EFC's, which worked for what I wanted. Just in case the list is useful for anyone else, I'll include it here.
--- Extended functions for code: R1758 00457 Video 2 48841 0 17097 1 16073 2 20168 2CH Stereo 16585 3 15561 4 17353 5 16329 6 16841 7 15817 8 49865 9 19912 Auto Decoding 08649 Balance Left 07625 Balance Right 53192 Bass Boost 36552 Bass Down 37576 Bass Up 08137 CD 41672 Direct Tuning 59806 Disc Skip 50332 DVD Enter 66716 DVD Menu 01180 DVD Menu 63644 DVD Menu Down 62620 DVD Menu Left 64412 DVD Menu Right 63132 DVD Menu Up 34716 DVD Power 61385 DVD/LD 28104 Main Menu 44745 MD/Tape 29640 Menu Down 28872 Menu Left 27848 Menu Right 28616 Menu Up 28873 Multi Channel 33737 Muting 59036 Pause 26780 Play 32713 Power 32457 Preset Down 33481 Preset Up 51612 Return 27548 Search Forward 25756 Search Reverse 28360 Shift 26268 Skip Forward 27292 Skip Reverse 13001 Sleep 45512 Sound Mode 60060 Stop 53448 Test Tone 67740 Top Menu 02204 Top Menu 36296 Treble Down 37320 Treble Up 07881 Tuner 08393 Video 1 65993 Video 2 31945 Volume Down 32969 Volume Up 00457 Video 2 48841 0 17097 1 48841 10 49353 11 48329 12 16073 2 20168 2CH Stereo 16585 3 40905 33/45 15561 4 17353 5 16329 6 16841 7 15817 8 49865 9 32201 AAC 19912 AFD 65225 AM 52937 Analog Direct 28360 Antenna 19912 Auto Decoding 65481 Aux 08649 Balance Left 07625 Balance Right 32201 Bilingual 45769 CD 2 53961 CD Synchro 08137 CD/SACD 41672 Clear 41929 Cue 20937 DAT 21449 Digital 1 20425 Digital 2 21193 Digital Selector 52681 Dimmer Off 53705 Dimmer On 53193 Dimmer On/Off 41672 Direct Tuning 52425 Display 61385 DVD 61385 DVD/LD 64969 EQ On/Off 50121 Execute 24265 FF and Forward 58313 FF and Reverse 66249 FM 24777 Forward 53449 Main 28104 Main Menu 44745 MD/Tape 49609 Memory 33225 Memory Scan 61128 Menu Down 61640 Menu Left 60616 Menu Right 62152 Menu Up 40137 Mix 19656 Movie 32201 MPX/Dual 28873 Multi Channel 52936 Music 33737 Muting 65737 MW 36041 On Screen 57033 Pause 08905 Phono 57289 Play 32713 Power 40393 Power Off 41417 Power On 32457 Preset Down 33481 Preset Up 37577 Rec Out Set 37065 Rec Out Set Off 36553 Rec Out Set On 24521 Record Forward 56777 Record Mute 57545 Record Reverse 25033 Record Standby 24009 Reverse 23753 Rewind 25289 Rewind and Fwd 56521 Rewind and Rev 20936 SB Decoding 28360 Shift 49097 Simulate 41161 Skip 13001 Sleep 44488 Snd Fld Mode Dn 45512 Snd Fld Mode Up 08648 Snd Fld Preset 60507 Source 41673 Start 58057 Stop 20936 Surround Back 64713 SW 1 66505 SW 2 07369 Tape 1 09161 Tape 2 57801 TC Program 53448 Test Tone 12489 Timer On/Off 07881 Tuner 48585 Tuner Band 45257 TV/SAT 08393 Video 1 65993 Video 2 20681 Video 3 19657 Video 4 20169 Video 5 31945 Volume Down 32969 Volume Up 11977 Wake Up ---
