Also check with your state's Department of Human Services. State titles can vary, of course. Attendees would share knowledge gained with VA amputees, staff, and rehabilitation teams. Churches, synagogues, and other religious organizations may donate or be willing to assist with fund raiser events. Many universities have programs to promote training for disability groups and for seniors' education.
Some foundations make educational grants.
Involve your group in collecting and selling aluminum cans for the travel fund. It may be helpful to collaborate with other community organizations in these kinds of efforts. Raising money is hard work. Rejection can be discouraging and taken personally, but it shouldn't be. This is also valuable information to share with your support group members and to distribute to new amputees during visitations.