best place for silicone wire
 

any ideas on where i can buy orange silicone wire in 12/13/14 gauge and not pay more on postage than the wire itself?

TQ Racing in the US do this... I think perhaps this is the same wire you have already got a postage quote for!

Other than that, I have noticed that Trickbits (distributed by Horizon Hobby UK) list orange wire - might be worth calling to see if they can suggest a shop to order from.