Looking for End Cam Retainers

I'm looking for an End Cam Retainter for a B16. I was assembling my cyllinder head when I noticed that the intake cam retainer was cracked. upon closer inspection the retainer was cracked all the way through and broke. I tried to get one through my local Honda dealer, but they couldn't order them withough ordering a whole cyllinder head.

Does anyone have any extras or know of possibly where I can buy a new one. Will I be able to buy a single one or have to buy a whole new set? Also would a retainer from a B18B possibly work?

Thanks,

Nabeeh