Yep, when I see the price some ask for a piece of fabric, just unbelievable!
I mainly use Quechua Sky Bags for my wings (transport and storage). 10 euros in Decathlon. Use that for years.
Also use Snowboard etc bags for fuselages (up to 6m gliders... they fit nicely). Great quality, waterproof and cheap as chips (Decathlon again).
I recently bought... Hang Glider bags! Absolutely perfect! With pocket etc.
For the blade wing joiners, last time I bought some, it was at Lindinger.