I have 2 older skinny style NOS 10# bottles with standard valves...work good. I've just moved up to using 15# bottles. This is a pictures of one of them..the other one looks just like it. $80 each or $150 for both. Think I may even have 1 or 2 4an bottle nuts to go with them.
Also have a Harris speed works aluminum bottle bracket..it's black..$100 (was $170 new). It fits a standard 10 or 15# bottle. This one uses cap screws instead of the quick release pins.