Mid priced attenuator upgrade suggestions for my SP-12?

The twin L/R gain attenuators on my SP-12 built in '13 have always been scratchy at best.  (master volume seems OK)  They come around for a while with some Deoxit but contacts on some positions only work with a little back and forth motion on the knob and are prone to cutting out.  Upgraded the selector switch to a Goldpoint right out of the gate to solve a cross talk issue with stock switch and quite like that, but don't want to throw Goldpoint $$$ at 3 attenuators.  

Going to have the SP box opened up when my M-125 build is done next month, so that's logical time to get at the attenuators.  The scratchy gain switches have to go and might as well do the master volume while I'm at it.

Anybody  have suggestions?  TubeCad/Glass Ware guy has some OK looking DIY stepped kits for $20-50 range and I've seen a bewildering array of Chinese Ebay type items, some of which are likely great values and others that are doubtless junk (but which are which??)

Thanks, Tim

Tim,
for the past two years I've been supplying the preamp kits with the same 21 step volume control that Bob has as an add-on for VTA70 buyers.
They work just as well as Goldpoints at triple the price.   They are made in China, but they work well.
Even though they are stereo, I just wire the two side (gain/balance) pots mono.    Haven't found anything better for less or for double the amount.

Thanks Roy

I had not even considered using half a stereo dact type attenuator for the mono gain adjustment.
Think I might have a couple of those laying about from another project but will have to find them to relearn what value I purchased and did not install. Am I correct in remembering stock value was 100K?? (10x 10K series resistors soldered around radius of the scratchy switch)

Cheers

yes, I use the 100K value, but it's not critical