emgee : hmm not that i recall but you're welcome anyways! i just try to make this section as lively as i can by doing a Q&A thingy
UK/SG all use 220Volt, US use 110V so a transformer is to allow use of something e.g bought from USA to be used in SG. common case with ebay. the transformer can cost anywhere from and to $60 etc. have you tried calling hungbros.com see how much they sell for? think "local shipping/transformer hassle and warranty" it may be easier and cheaper to get it locally