Thanks Griffin, after my original post I had found the international link and got to the i-parcel order form but it would either freeze the page or give me a URL not found error after filling in the form and clicking proceed to checkout. Solution I found see below...
Turns out this was my issue...for some reason I couldn't complete the i-parcel checkout page in firefox on an imac, but could in safari
Oh well, order placed now...fingers crossed they have good stock control and the website doesn't allow orders to be placed if they have run out!?
Really want that MP TC