18mm hole hose brackets
 

I want to install an ATF cooler, and I can see a nice way to run the hose back from the front. Hose fits in, everything dandy - except I don't know how to secure the hoses. There's nothing down there, except... I can see these nice (18mm diameter) round holes on the body in there, and I can tell this bracket is using one of those holes:
http://imgur.com/a/ItsDC

Now, I'd need a bigger bracket, something that can hold 2 ATF hoses, and I'm wondering if anyone has an idea what is it really called or where could I buy one?

Thanks in advance!