Looking for sources from exp builders

[crusher]

Hi I am working slowly on a 1/14 ish Cat 330b. I am looking for help finding the type of fittings you guys are using on your valve bodies to cyl etc. I am preferably looking for push to lock type, size and diameter tubing. I know the larger trucks use these type of fittings in the dash boards for air accessories, however the tubing they use is only rated for 150psi. I did find some similar types from us sellers, but the cost of shipping them north of the border was almost $30 for an envelope?
Appreciate any help offered.
Terry