We're talking about a $5 (max) audio decoder chip and a (probably cheap) CPLD to interface that chip over I2S to Zorro/Clockport. Admittedly CPLD programming and AmigaOS software drivers will be a disproportionate cost, but €200 is still going to be a bit on the high side, IMO.
For fifty quid I'd buy one instantly. Any more and I'd struggle to justify the cost.
I got given an el-cheapo USB soundcard a couple of years ago and thought I might use it with my Deneb when I eventually get around to it.
Not sure if it's compatible mind you so one of these Prisma cards is looking quite desirable, especially as it supports hardware accelerated decoding.
I'm wondering if it comes with a licence from Fraunhofer for the MP3 decoding?
Not that I give two sh1ts either way but there are some on here that will accuse A-EON/AmigaKit of being theives if they don't.