I think that there may be some exaggeration going on. I think that I bought about 3 LE2014s plus a partial baggie of leftovers from a semi-retired Geekhacker, and built a full-size and a TKL from that. And after selling off a few switches some time back, I still have another baggie in reserve with enough to do another TKL.
Almost all of the ones I had were usable, although I did spruce them up as best I could. And I have no qualms about filling in with good clean white Alps on all the "ignored" keys to conserve the more precious blues. The technical specs on white and blue are nearly identical (as they are on the orange/salmon/black variants), so substitutes and infills are entirely acceptable.
My advice for a normal (ie not fanatic) consumer would be to buy a new bag of Matias and install them for a dependable "sure thing"
If you are cheap and/or inpatient, the Dell AT101W is an excellent recipient chassis and is also available in black. And I think pearl/pebble keys in a black case looks great, so you can keep looking for the rarer PBT Dell key cap sets.
And if you have more time and money, the Northgate Omnikey 101 is the premier chassis to receive your endgame Alps switches.