grandpa's special bike was stolen

Our 85 yr. Old Dad/Grandpa's specialized bicycle was stolen from the back yard. He has macular degenerative disease, and is almost blind. His only means of getting out to connect with others was this bike. It was a specification built only for him. To replace will cost $3,000. Many of our Family and Friends expressed a desire to help pay for a replacement. His depression from the loss is a worry!!!
Thank you all in advance!!