http://www.toolshedtoys.com/details.php?prodId=657&category=7&secondary=&keywords=

the packer: http://www.toolshedtoys.com/details.php?prodId=173&category=6&secondary=&keywords=

If anyone knows of any other better straps (or packers) then let me know, please.

Also if anyone knows how I get stuff delivered to the post office instead of straight to my address (in the UK) that'd be great.

I have not heard too many good things about the mr right packing strap.. But it should work for that packer.

I don't have experience with any of them since I just use boxer briefs instead of a strap to hold it but here's a site that might help you out. As for packers I use the packy from early2bed.
http://www.ftmguide.org/packing.html
It has packer and harness suggestions. Hope this helps.

Thanks, guys.