EVERYONE is having difficulty obtaining silicones right now. The supply chain for these - especially the cyclics - is distorted and super tight. Price for D5 in many spots is now 400% higher than one year ago, and that’s if you can even get it. Dow-DuPont declared force majeur a while back (why? who knows) and that sent the silicone market into a death spiral of supply where it was already headed. Yeesh! Good luck. I’ll suggest trying the smaller suppliers, like A&B Specialty Silicones in Illinois USA.