The collected works of krafty

I've been working on a little pet project for a while, and I'd like to expand it to SGIs. I've been collecting PROM programs from all of my hardware (At least all that is not flashable) and saving them via my EEPROM programmer in an archive. I have most of the SparcStations, and would like to start on SGIs.

The purpose of this is so that if a PROM is lost for some reason, or you get a corrupted one (As used to happen occasionally with the Sun boxes) I can can pull it up off my database and re-program the EEPROM, drop it in place, and be done with it.

Is there a difference in the PROMs from the various PI machines? Should I get both a 4D/20 and 4D/30?

If anybody has any EEPROMS they could loan me, or could just send me the bin files from an EEPROM programmer, I would appreciate it.

Likewise, if anybody needs an EEPROM, let me know- no charge for re-programming, I'm just doing this for historical purposes, not profit.
There once was a woman named Bright,
Whose speed was much faster than light.
She set out one day- in a relative way,
And returned on the previous night!