Its so happened that I saw it today, I must say its a lovely job done and real DIY (not that go to mechanic and get a engine swap and its DIY).
For those who are looking for a local name then it should work if you say "plastic ki Nalki" and other places I can think of is "embroidery shop" where they sell those knitting and sewing and beads stuff like in Bahudarabad and also science lab. equip shops in Urdu Bazar (all cities have Urdu Bazaar).
Cheers,
Kaleem