There's a Domke F-803 satchel on Amazon Warehouse now for under $50, shipped free.
It's black ballistic nylon - not canvas - listed in Used -Very Good condition.
https://www.amazon.com/Domke-701-83B-Camera-Satchel-Black/dp/B00009R8AI/ref=sr_1_9?tag=pentaxforums-20&m=A2L77EE7U53NWQ&s=merchant-items&ie=UTF8&qid=1539605601&sr=1-9&keywords=domke
I have purchased several Domke bags from Amazon Warehouse.
Their "used-like new" and "used - very good" bags are typically
customer returns in excellent, new or near-new condition.
If you want it don't wait long; I'm not the only one who checks this stuff daily.
If a Pentax Forums member purchases this please post in this thread.
Chris