Where to get 273 Head Gaskets?

I'm one of those guys. (obviously) LOl It's been a while since I've built an engine. I've owned 13 Mopars and this will be my first Mopar rebuild. I'm learning
more every day. It's lots of fun and a little scary at the same time. I ask a lot of questions and learn a lot as I go. I have a hard time coming up with the $$ and the time to do this drive train rebuild project. I just want to get the best results with the $'s spent and only do it once. There's a few parts that are hard to find for the HP273 build. One is pistons. Thanks to Egge for making a duplicate of the originals for knuckle heads like me that want them. Then there's the head gaskets. Someone has some old ones laying around if no-one makes them new and the proper size. (I will use the 4" ones if needed)
I have asked questions about clutches too. The 9 1/2" stocker is pretty weak. I still haven't found a HP 10" clutch that will work with the 10 1/2" bolt circle flywheel. I'm pretty bull headed and haven't stopped looking yet! LOL Clutchmasters will probably rebuild mine with stronger springs and kevlar dics material. The new dual disc set ups look interesting but I don't have $800
to spend. That's why I dig deep to find the answers. toolmanmike