I did a search on S-video and Distribution Amplifier, here is what I got as a result [Link: google.com]

looking at a few of the links I think you might be better of getting a Sima svs-4 (4 in 2 out video switcher [Link: simacorp.com] it is less expensive, and will do a good job (plus you can use it for the video switching instead of your receiver)

the only one that I saw from the search that is less expensive (and by quite a bit) then the Sima is at [Link: svideotorca.com] but it is just a Y and I would not expect a good image since you would be splitting the signal strength in two.