HBR is a hilariously decent label, considering it stands for "Hanna-Barbera Records". Even the cartoon cash-ins (Flintstones records etc) were extremely competent rock & roll records. WFMU's blog has a cool post about it and Spectropop has a page that includes this single, though not listenable.
This here Pop-Ups record is a double instrumental, the better of the two (I think) being the slinking shaker "Lurking", which has a Revels-ish boogie to it, including an organ solo and some honkin' sax
"Candy Rock" sounds a little more like the Routers with marching band instrumentation over a Bo Diddley beat. Fun but probably not going to make you hit eBay.
and a link to the other HBR record I posted, one of my absolute favorites
