I recently received a new bore guide from Sinclairs and the bore guide is shipped out in a new style screw together tube. They are 1" x 12" when screwed down, hard bottom and top, great. Over the decades the original tubes crack and flat wear out with the funky caps. I've tried calling Sinclairs but the three seperate departments, Customer, Tech, back to customer service with no luck getting a part number for the new style tube. They look like a high grade drill bit container. Anyone know of a source for a plastic tube, threaded 1" x 12" when closed? thanks