In Benelux I found a real good price for the Etherline P flex 2170300 (which is in recommended list).
I bought 100 meter for 213,14 Euro. incl. VAT and shipping. I am using a Schill wheel GT310-RM. Works great and is very compact.
The website can be found here:
https://lapp-kabel.hardware.nl/2170300%252F500
regards
Pascal
GLD80 
