Looking for small project box for inline splice (approx 15 x 15 x 35 mm)

I have been searching for a small project box to house an inline splice of low voltage cables of about this size: 15 mm x 15 mm x 35 mm. I have plenty that are 35 mm x 35 mm x 15 mm (square) and larger, and plenty of other small sizes, but think there must be small rectangular ones out there without making a custom item. If anyone has seen an item like this, please pass it along.

Thanks!
Michael

In addition to boxes, have a look at the Scotchcast series of products from 3M. These are kits that allow you to mold a rubber covering over a splice in a way that looks pretty professional. A friend of mine used these and was pretty happy with the results. I find them using keywords scotchcast and splice on google.

These people make some nice quality boxes, have a look and see if you like anything:
OKW USA | Plastic Enclosures | Electronic Enclosures | Tuning Knobs