Weld-on or MCBond will both work well though the MCBond is not nearly as common. IME there is nothing at HD or Lowes that works nealy as well as actual acrylic solvent. I've heard tell of some HDs actually selling Weld-on but never seen it myself. You'll have to find a place that sells both the solvent and applicator bottles, well, you don't *have* to use the bottles but makes the whole process much cleaner and easier.
Call around to the local plastic shops, all they can do is say no
but you'll need to know which solvent you want, Weld-on 3, 4, or 5. You won't sound like a moron at all, that is, after all - what they do for a living.
James