I work in a hobby shop, I ordered the 16x4W APC from Horizon.

If your local shop deals with Horizon, he can get them. He might need to update his Horizon Catalog (if he's using a PC to do his ordering). The 16x4W didn't show up until pretty recently.

I'm off tomorrow, but I'll be working Tuesday. If you need, PM or email me and I can get you the part number if your local shop doesn't use a computer for ordering.

David