Blank CD-Rs designated 'Music or Audio Only' for stand alone CD recorders

[lovatoj@msn.com]

I have a one of the first Pioneer home CD Recorder (PDR-W739) that was made that I haven't used in many years. Unfortunately what it that takes to record is a special CD-R disc and can't seem to find them. When I try to record on a regular type CD-R, for PCs I get a error message 'Pro DISC' indicating the CD-R I am trying does not have the Consumer Use designation.
After some extensive research I found out that my Pioneer recorder and other standalone recorders need CD-Rs that have been designated/labeled for 'Consumer Use Only', or "Digital Audio/Music CDRs", ONLY. These recordable blank CDs are compatible with the stand alone home recorders.., like Philips, Pioneer, Marantz, but have found out they do not manufacturer the CDRs any more.
Does anyone have an idea where I might find some of these blank CD-Rs.
I have tried ebay and amazon and actually got a lucky and found few from a seller selling old blank CDRs but I had to buy 50-60 of them before I got a few.