I have my old one laying on the bench. It's an Aratron G28-300-2500N-02. It has a 300mm stroke and 2500 Newtons forces. The one I ordered from McMaster-Carr is 500 lbs. of force, which is pretty much the equivalent. If you move up to 5,000 Newtons, you may not be able to compress it very easily. I think that would be way too much force. I haven't seen any listed in-between 2,500 and 5,000, but that may be out there (or adjustable).
Jake