I believe the crockery shop near MS Colour sells those steel cocktail shakers.
U can check it out the next time u pass there.
Wide range of liquors?
Meidiya Supermarket at Liang Court have a selection of liquors. But the range is primarily Sake. I did see a couple of ang mor liquors as well. U can try Carrefour Plaza Sing? I think they've got a section on level 1 that has got this whole range of wines and stuff like dat.
Adam, depending on how 'hard-core' you want your home bar to be, general bar equipment can be easily gotten from IKEA (cheap, functional but not very high class) to the most expensive crystal ware. Search the large department stores like Tangs (basement) to get a general idea of what's available (a LOT!).
IF you're thinking of a full-bar set-up, then you need to also consider the actual bar erection, and all necessary fixtures like a storage space, sink and mini fridge, as well as glass storage racks.
If it's just for fun, and you want to keep costs low, go for the most important things first - the ingredients, cheap glasses and accessories and expand/upgrade later on.