Seal expander additives?

Does anyone make decent seal expander additives for transmission radial seal leaks?

My input shaft on my A-833 is leaking past the radial seal which is brand new.

My bearing retainer is brand new but the input shaft has a dip worn into it from years of use of the old seal rubbing into the shaft.

Is there anything I can buy like a helper sleeve to put over the shaft or has anyone had any luck with seal expanding additives?

Call Micro Sleeve, they are located in Arlington, TX. they will give you a distributor name. Google for their number or site.

Do Not use any seal swellers waste of $$$$ won't fix anything

Thanks r/h.