I thought the absence of machine shop facilities might be the case in Namibia, hence the suggestion to see how she runs as is.
Alternatively, you might want to google around and look at Moglice. It's an epoxy-like substance used for repairing damaged ways on machine tools, including some pretty large ones with high loadings. It depends on how much your bad way is worn down. If the original surface is partly intact with many deep gouges in between the high points, you may be able to fill the gouges with Moglice. It is done by building a "dam" around the area, setting the job dead level then pouring on liquid Moglice and letting it set in position. Or possibly by troweling a thicker mixture on to the gouged areas, which probably would need more hand finishing of the hardened product. Or even by putting the ram in place, with a release agent in place, and pumping the Moglice into the gap with a grease gun or caulking gun etc through those oil holes.
Or, if the bad way is worn down past that point, which you will need to measure off the good way, it may require thin strips of Turcite to be glued into position. This often requires machining after fitting as strips are often too thick.
So, if the good way is good enough, you might be able to jury rig something machine tool reconditioners call a sled that runs up and down the good way and has a cutter mounted to it that can machine down the bad way. This can be as simple as a lathe tool bit mounted on a cross slide arrangment which is manually pushed up and down the good way while taking incremental cuts off the area to be machined. Or you could go as far as to make a sled with a milling cutter or a small toolpost grinder type attachment in place that is likewise run up and down by hand while taking small cuts.
If worst comes to worst, you could use the "good" way as a reference surface and file and scrape small areas at intervals along each way that are carefully brought down to a specified depth below the reference surface. Once these are set up, the whole way is then filed and scraped down to the reference areas and scraped flat to a surface plate and straight edge etc. Very painstaking work and very high skill level.
Edited By Hopper on 13/07/2017 11:18:24
Edited By Hopper on 13/07/2017 11:19:46
Edited By Hopper on 13/07/2017 11:21:26
Edited By Hopper on 13/07/2017 11:21:49