Help Leland get a new Bike

Yesterday morning, we discovered Lelands bike had been stolen from our yard. We live in an apartment and we do not have access to a shed/garage or any real type of way to secure belongings outside. Still stealing a bike is not acceptable. 
Leland has cerebral palsy, adhd, and falls on the austism spectrum. This all stems from a stroke he suffered in utero. The bike he had was an adult 3 wheel tricycle. It helps keep him steady and safe so he can ride a bike. This was a birthday present this year. After the time it took to receive it, put it together, recieve missing parts and our brother in law specialize the breaks/gear shifter to lelands good side, he has had it less than 2 months. It was a 400 dollar bike. I know asking others to help pay for someone else's mistake is alot to ask but he deserves this so very much. Hes very upset. As we all are. Thank you for taking the time to read and help if you choose to.