It looks like noone makes 100MHz crystals in the usual hole-mounted cans like used on the A1240.
However, you're studying electronics, right?
Buy the 100MHz version of these:
http://www.elfa.se/pdf/74/07459001.pdfand then download this pdf as well:
http://www.elfa.se/pdf/74/07455769.pdfNow make a small circuit board with 4 pins which you can mount the ####er on.
Or maybe I should just fess up and admit I have a certain feeling about this project, so I might test it out myself first, then send you the resulting product :-)
Would be cool to have, I must admit. Might even be worth a bigger cooler to get from 60 to 100% overclocking :-)
I know the sonnettech 50MHz 68040 was really an overclocked 25MHz, but with one HELL of a cooler. So why not? Standard Athlon cooler should do the trick. Maybe best to add one of these, though:
http://www.elfa.se/elfa/produkter/no/2004248.htmBut at that price? Never :-)