Where can I buy a time machine?
541910
Good luck Sweetheart!
294775
eBay would be the 1st place to check.\nYou never know what they will have.
328020
Try Ebay. You can find everything there at a resonable price.
164968
Try Ebay...you can find almost anything there.
204466
You may want to try Ebay.com.... they usually have things that people buy and then they resell them.
152797
http://www.ebay.com you can find anything
629101
Honestly Ebay is the place to start. Post a search request and as soon as one comes up for auction they'll email you the info.  Or you can post it under "want it now" and if someone has one for sale, they'll contact you.  Everything on the planet eventually ends up for sale there.
269481
It depends on where you bought them from. Chances are they are gone, but if it is a reputable place, they may have them online. Where was this?
1169054
Try E-Bay that site usually has any and everything you could possibly want.
291477
Like the one in malcolms room,try ebay!
667315
Can't seem to find anyplace, but here is a thought.\nIf you have a used one, scan it into your computer, clear it out, and print as many as you want.
608789
eBay is your best bet!
339700
Check both vintage stores (online if necessary) and ebay.
187396
Try http://www.ebay.com !
312901
You can go to Ebay. It has everything. Trust me.
1172941
Show me the time machine and I'll show you the money
923615
Best bet would surely be from their shop or failing that, if they are in short supply then try ebay.