They come up on ebay often enough like this one ( not mine , just for eg.) ; https://www.ebay.co.uk/itm/152940003358?ul_noapp=true .
Notice the red peg's ?
Make sure if you get one it has at least 4 of them , there to keep the print's / negatives seperate .
When I got mine last year I paid about £40 for it . Prices are all over the place from £30 up .
Don't be in a rush to buy one and you'll get one for a good bit less than the one I linked too .
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