Don't sell them to anyone else for the moment. I have an original 500LX front mech, but the rest has been replaced. I assume that you have a rear mech, but do you have STI shifters?
I have a 400LX chainset in black you have have for £5 + postage. It'd have to be stripped to silver to be honest as its a bit tatty but threads and tapers fine and barely no wear to the rings.