no point go injection or blow moulding if u only want small quantity. nobody will do it for u unless u got direct contact or relatives. wait heat up and changeover time oredi kill u. mould also not cheap. small small mould if want good quality can cost up to 30k or above. if not so quality got around 8-15k. but still nobody will inject or blow if u no volume.

vacuum forming can try. cheaper alternative if your design not too complex. some ppl call it vacuum forming, some ppl call it tray stamping. basically the mould casting is still cheaper than injection moulding. last i ask, around 1000+ only for mould.

then 3d printer u can try la as prototype. but if u wan more towards actual, u better be prepared to pay lor. finding someone to do for u for 1-2 piece is gonna be the tough one even if u are willing to pay.

yes. i think u got me wrong. 3d printing is good and i meant to say that its better to use 3d printer as prototype. but if he wants more like actual and final finished product, its gonna be difficult for him to find someone to inject or blow mould for him just for 1-2 pieces. That also would cost him an arm and a leg for those 1-2 pieces .