You have a very worthy cause. I don’t have any equipment to ship to you, unfortunately.
Have you posted your request in local Craigslist or other for sale sites in your area? Shipping of fitness equipment, particularly weight training equipment, can be very expensive. Your best bet might be to post your request in local places.
Another thing you could do is contact fitness facilities / gyms in your area with the same request. Places occasionally upgrade their equipment and dispose of their old items. If you’re an nonprofit organization, a donation of equipment to you would be tax deductible.