The Customs breakdown is usually:
Item-specific customs charge (3.5% of the sum of item price and shipping for musical instruments iirc)
Administration fee from the courier (be it Royal Mail, FedEx, Parcel Force or whatever).
The last one's the killer: working everything else out is straightforward, but basically the courier can pick any figure they feel like off the top of their heads without rhyme or reason. It's the "we will charge whatever the **** we want for the privilege of paying customs through us and there's nothing you can do about it." fee.
Whatever I do it'll be an offset waist model so I'll go for a Mastery bridge. Jags are a little complex wiring-wise so I'm now down to a JM or a Mustang.
I'm not a huge fan of garish colours though - I love sunbursts, but a transparent red or blue will be striking but would also show up the grain of th wood up close.