Hi,
I still use a quite elderly Epson 3170 Photo. This is a general purpose flat bed scanner but it has a built in light source in the top panel and came with a set of film holders (for 35mm mounted/unmounted and 6×6 format). I really like mine.
You can pick them up second hand (ebay etc) quite cheaply now. I’d check the driver software is still available from Epson before you consider buying one, just in case…
Cheers,
Bill.