Customized Corrosion Resistance Double Flange Limit Bellow Rubber Metal Expansion Joint

Good morning,I'm Alberto and I take care of the industrial division for EMIFLEX S.p.A.We have been manufacturing metal expansion joints for over 40 years but we are dealers for rubber ones.We are looking for a reliable partner to provide us with these items.In order to deepen the discussion, you may want to help EMIFLEX with the questions described below:The elastomers normally we used are the following :NN (Neoprene on both the outside and inside);EE (EPDM on both the outside and inside);NP (Neoprene on the outside   Nitrile on the insideNH (Neoprene on the outside   Hypalon on the inside);NV (Neoprene on the outside   Viton on the inside);Do you have all these types of elastomers available?Can you provide us with documentation attesting to the certifications you have by UL/FM.DNV,ISO,WRAS,RINA, Llyoyd Registrer etc etc..Can you send me the price list?I look forward to hearing from you.Best regards,Alberto TagliamonteEmiflex S.p.A. Industrial Division