I think Nizz’s is definitely the best suggestion if you don’t want to go about replacing hardware that doesn’t need to be replaced.
I’ve heard the LS-40 shaft replacement argument before but I think it’s needless to do that.
Besides, the only place online that I’ve seen that sells a bunch of these Seimitsu parts separately is Akakihabarashop and that’s closed until at least later this week for a server upgrade. Unless you happen to find an SRK member who has a bunch of spare parts he’s not going to use (including an LS-40 shaft), what’s the point of buying single parts and paying shipping that costs more than the part(s) in question?
If you want to put a cover on the LS-32 like I did, then mod a a JLF-CD cover if you have a spare JLF-CD set and small metal files. (I use a round coarse file to do most of the thinning out and a smooth semicircular file to smooth the interior out after the coarse file’s work is done.) Spread the work apart between two days if you have to because you’ll need to thin out the JLF-CD cover from the inside to about half its normal thickness to fit the LS-32-01 shaft. It takes about 30-45 minutes to do this by hand with small files. You have to stop using the coarse file occasionally to clean the plastic filings off so that the file works properly. I don’t know of a drill bit you can use to speed this work up without destroying the JLF-CD. Regardless, when you are working with pieces this small, I think you have to do it by hand and take your time. Using a power tool makes it more likely you will both destroy the JLF-CD and hurt your hand.
(People have said there is PVC piping sold in Europe that fits the LS-32 shaft but unless you live in Europe what good does that do you? I don’t know of PVC pipes sold in the US that are that thin and readily available.)
After you’ve thinned the JLF-CD to fit the LS-32-01 shaft, you have to cut off about 3/16 of an inch from the top of the cover to fit the shaft since the LS-32-01 shaft is shorter than the JLF stick shaft. I used a dremel with a spinning sander/cutter wheel to cut the JLF-CD down in height.
It’s worth the effort if you have the file tools and dremel to do the mod. Most of us will collect those tools and use them over time for other household purposes so it might be worth it to buy them anyway, mod or no mod. You don’t have to spend top dollar on tools though and can get reasonably priced file sets and dremels that don’t cost more than $20 and $60 respectively.