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Double Bass Looking for Concentric EQ Knob Inserts for SWR Baby Blue II

I posted this on the BG side and thought maybe someone can help here.

I bought a basket case SWR Baby Blue II that I'm in the process of rehabbing. I'm taking the head portion to my go-to amp tech (GPS Electronics in Norwalk, CA). Looking through all of my parts, I found I had bought the inner and outer, concentric EQ knobs for that amp years ago when I had one of these amps. However, the dial indicator inserts were not included with that order. I'm looking for those inserts. If anyone has any (inserts or whole concentric knobs with inserts), I would love to buy them from you. If you know where to find the knobs or inserts, I'd appreciate information.

I found the larger knobs for that amp on Ebay but not the smaller ones. Any help would be appreciated. I've included a pic below to let everyone know what I'm talking about. Thanks.
swr-baby-blue-ii-knob-detail-jpg.4978140