The covers you show look like they have been machined from a solid billet
you could machine what ever design you wanted, but the cost for just a few would be very high.
You could machine your standard cover I did one with R/R cut out, looked ok but the standard covers are made of two thin aluminium pressing and by the time it was near finished you could almost crush with one hand so gave it up. I bought a Tecmoto half vented cover but only had it on for one week the noise drove me mad so put back to the standard one
