Thanks again all for the comments!
So the Gold Head Comps arrived from LiveAquaria.com the other day. All three were great looking specimens.... problem is they are basically jumbo fry! All are fiesty, beautiful, and approximately less than 0.5 inches in total length.
This size is certainly not what I expected (or what was advertised online) so a quick call in to customer service resulted in a no-questions asked refund. This is why I like doing business with this company.
Naturally, I added them to the tank nonetheless, and prayed that the bichir wouldn't promptly turn them in to live feeders. A testament to how strong these fish are, they are taking NO lip from the bichir, and all three seem to be doing very well on their second full day in the tank. There is plenty of rockwork for them (especially at this size) so they seem perfectly content to scuffle a bit amongst themselves and eat.
I'd post shots but my camera doesn't take close-ups well and these guys are small....