I just ordered this one:

[Link: spectravideo.com]

It's a new IR remote for the PS3. As soon as i get it, I'll tell you how it works with the Pronto.

[EDIT] ooops the link doesn't go to the product... just select EUROPE region, then PS3, and you'll see the remote.

Here is another link to the same ebay item:
[Link: cgi.ebay.fr]