Yes there are bigger than 50's.. but the 50's are "figured out" by the chip guys.
Delphi and MSD are the brands.
Eric can be reached at
Eric@turbotweak.com
I am a dealer for his alky chips. So I have those in stock.
As far as burning your own, my suggestion is let somebody else do it. Even if you had the equipment today, and started learning.. would take you an easy year of heartache for what less than a 100 bucks can get you. Its ok to buy the burner, intronics makes the pocket programmer which you can burn your own, and if you get a direct scan, you can then email files and images back and forth with your chip guy till the issue is resolved. Saving on time and postage. You'll also need an eraser to erase the chips.
I have the programs, equipment, and enough knowledge to let somebody else handle making the changes...
Quote from Clint Eastwood... "A Man has to know his limits"
And based on your questions asked.. you are far away from being able to replicate what a good chip guy can do.
Who to get the injectors from... contact vendors asking for pricing.. There are a few of them like Precision, Racetronix, etc.. that advertise here. Thats your job ;D
My advice comes down the pike as its been handed to me. I learn from those that have been there done that. No majic.. theyre $$$ mistakes have shown me the light. Deviate from the tried and true.. be prepared to $$$ the consequences.
HTH