A group, Ocean Guardian, is planning on restoring the former WMEC-167 USCGC Acushnet (former USS Shackle (ARS-9)). They are in Washington State and looking for volunteers and donations. Sorry I can’t vouch for them.
Sounds like they plan on making the former WMEC a working ship rather than a museum. More on the Ocean Guardian organization here.

Current status. http://www.goanacortes.com/all_access/article_8f2a89fe-8d06-11e7-8ac0-6369b9587072.html
Chuck, Thank you for this Blog about OCEAN GUARDIAN and the Acushnet. It would be exciting to work with you in the future as we bring the Acushnet to operational standing for our future missions. Please feel free to contact me at 970 599 9485 or Robert Wells at 303 7174951 he is a former special investigator with the USCG if you have any questions or comments.