I'm looking to get some of that silver reflective foil...
Would like a larger sheet, not just the size that fits in the windscreen, I'm sure I have seen people with larger sizes at shows but don't seem to be able to locate any as I don't know where to look and what it is called!
Is it something else than car accessory people use?

we got some very large ones from e bay.
quite good price to as i recall.

CountryMun sell reflective sheeting.

Machine mart sell silver backed tarpaulin at a very reasonable price and it's just as good (but considerably cheaper) than other stuff - just looks a little bit less posh!

Try this link

http://www.agilitywarehouse.com/product_detail.cfm?id=1499

Thanks for that. 

I have been wanting to make a reversible cover for my show trolley but didn't know where to start to find the reflective side.

Will measure up and send for some, any off cuts I will try my hand at making reversible dog coats.


Presumably I can sew it with a domestic sewing machine.

http://www.ventlock.com/blanket.php

I have the windscreen and blanket and they really do the job well.  Not sure how they compare on price though.