[amsat-bb] Source for affordable bias-tees?

I'm purchased 2m and 432 preamps for my satellite antenna system and both will require external bias-tees for power. Looking around on both US and UK/EU websites I've found bias-tees that cost almost as much or more than the preamps did. The inexpensive devices I've found are receive-only and meant for SRD users.

Does anyone know of a source of bias-tees that cost less than $100.00 each, have decent specs on 2m and 432 and can withstand a transmit power of 50 or 100 watts. (Yes, I know I don't need to run 50 or 100 watts for satellite work but I don't want devices that will fail the first time I accidentally  transmit "QRO".

Thanks