Like many would be pole aerial photographers I have run the gamut from thinking about purchasing commercial adapters to DIYing one. Problem is that a commercial adapter only works on certain pole types (painter's poles typically) and specialist DIY rigs for carp poles won't work on anything but carp poles (or equivalent diameter). I found a earlier post in which a flexible griping tripod was used on a carp pole (see below). I went out and bought a small Targus Grypton from Wal-Mart for $9.00 and easily attached it to every type of pole I had. The "agility" of the rig makes Nadir, oblique and interesting selfies very easy. I do recommend (as in the earlier post) that you use gaffers tape or rubber bands to secure it even though these things can grip well (or some other backup method of securing the tripod to the pole). Given the variety of flexible tripod types (with larger designs able to hold multi-pound DSLR/camcorders) they should be seriously considered since, unlike a specialist adapter, you can take them off and use them on other pole types or just use it as a tripod. For the same money or less for a specialist adapter, DIY or commercial, you get a multifunctional item. I'm not sure where but I have even seen some made into KAP rigs. Hope this helps would-be pole-mappers and PAP enthusiasts.
http://publiclab.org/notes/cfastie/08-11-2013/garden-pap-map the post where I saw this great idea in action