Any Bioplastics for Rotomolding?

Hi,

I'm looking for a bioplastic that can be used with rotational molding. I need an equivalent to HDPE. I plan on making standup paddle boards so the bio-plastic needs to be UV and water resistant.

I have had no luck finding any besides ECO RENE 9005 from ICO polymers and Matrix XBK25.

Are there any others? Could I use a blow molding plastic with an additive if necessary?

Any help would be appreciated!!!!!!!

-James

keywords: bio polymer, biopolymer, bioplastic, bio plastic, pla, castor, polyethylene, roto-molding, blow molding, blowmolding, starch, eco