| Azona A02 should have them. They're actually a fashion retailer, but they have some random stuff like Holga and Lomo cameras for sale too.
Address:
1. LCX, Harbour City, Tsim Sha Tsui
2. Under the JP Cinema, Causeway Bay
Otherwise, there's a shop in Rise Commercial Centre (a tiny tiny shopping centre full of equally tiny boutiques, off Granville Rd, TST, in an alley called Granville Circuit, I think) that sells all sorts of quirky, vintage cameras. | 
