Marantz 10b repair

I always made up the opto couplers under the assumption I would never find the originals. Seems to me most of the time the neon bulb has failed and you can re-use the LDR. I wonder if that HiFiBruce ever got his sorted tuner out? Sounds like the discriminator was out of alignment.

Hi, I would like to know if their is still a few bonafide, true repair services available today that can bring back my 2 Marantz 10b's back to original life I happen to own. They work fine but needs to be gone thru since they have never had any prior service done to them.... anyways,  shipping is a big concern to me and would like to get some advice from the professional veterans here on Audiogon on whats best.

p.s. I own a few new original opto couplers from one of them. I take it these parts are dinosaurs and not easily available. understand knowing the specs. of the oeiginals may help.
Thanks,
Ronnie
a newbie

@hifibruce ,

Contact Kevin a K&K Audio, (he's in N.C.) he'll give you the info you need.

Steve