Hi guys. New to the forum AND the hobby

Just got my B. Boehmei sling 2 weeks back. Been doing well so far. 2 successful feeds. However I have been doing A LOT of reading, and I would like to use dubai roaches instead of crickets, and was wondering if anyone knew where I could buy some in the East Rand. Thanks!
Attached pic of my re-housing. Best I could do in such a small enclosure