Pioneer PDR units were available.
I have my broken one on ebay now, it was great for a long time, many years.
Its got some disc error now so I posted it incase someone needed parts, or wanted to have the board changed out.
There are some on Ebay search Pioneer PDR.
IMO, I think with computers and even laptops getting so cheap, standalone CDR's are becoming obsolete.
Alesis Masterlink is highly rated and I came close to getting one,
but now the HR standalones have CDR too.. so for example I got a Tascam2488 that has alot of the Masterlink features such as Compression, Edit, CD-R Premaster/master.... and alot more. for $1000 approx.
I think the Masterlink would be good if much cheaper these days, of course you can get a pc that has much more to it than just CDR
...but you stated you don't want a pc.
good luck. yeah I miss my PDR555, it was so user friendly.