Boat trailer axle Help

I have a Karavan trailer, always hard to find parts, hubs etc. I need to replace my axle and I found one at norther equipment and tools. Problem is, specs say center leaf measurements is 69 1/2 inches to 73. Mine is 68, can I still use it. I want an axle that I can get parts easy for.

You can get any size you need here:

https://www.championtrailers.com/trailer-axles/

Thanks for the help, but actually used sturdybuiltonline.com, got a Dexter axle from them as little cheaper, 3500lb. For 204 and hubs for 28. Free shipping, 3 day turn around, no tax from Florida. I wanted a Dexter, and they were the cheapest, specs matched mine, and no drilling.

Wanted a Northeren tool. But specs didn't match after I talked to someone, then watched the videos on the Dexter axle, and how easy it is packing the bearing than using a bearing buddy, Which puts the grease from the front, Dexter packs it from back to front, pushing out old wet grease..