blinds can be made anywhere. we got ours done at Flourish in Central on Li Yuen West Street. I think the owners name is CK and he was so nice and helpful. Spoke great english and came out to our place on the southside to measure and had curtains ready the day we moved into our new place - key for our son who needed blackouts to sleep. Flourish also does custom rugs. If you are not looking for custom rugs, then try Ikea, Franc Franc, MUJI, Spotlight (also has curtains/blinds), B & Q and there are a few Persian rugs shops in Horizon Plaza in Ap Lei Chau.
Office furniture - Ikea really might be your best bet, but Franc Franc might have some stuff too down the block from Ikea in Causeway Bay.