Sending a Honda S2000 ECU and ignition barrel over to oz but i'm struggling to find anything under £45 quid! Seems pretty expensive.

dimensions are 24x23x10 and it's 4kg

Anyone know of a cheaper service than what I've found on Parcel2go?

£45 for 12,000 miles seems OK to me.

that seems cheap to me as well.

every so often we have to send one pair of boots back to southern ireland and they cost £25 to send

+1 that's a fair few miles!

Nope - Interparcel (Fedex) was £45 as well.
Parcel Machine (DHL) was £49.02.

Try Transglobal Express Linky, we've sent lots of packages to my daughter in Oz, these guys will get you the best deal

That's cheap - and I ship all over the world all the time, you won't get less than that.