In fact, I'll go out on a limb and say that Shoppers sound like Rites of Spring, if RoS weren't pseudo-profound mopes, and instead had even an ounce of subtlety.
Hit me harder. I think this cassette is still available from the band, you can contact them here. While you're at it, pick up their debut LP, Silver Year. Majestically trashed, emotional punk (yeah, fuck you, I just used that phrase on Drug Punk!).