It has been a long and fruitless search for, "just a little taller" Luger front sight blades and / or an alternate type that you can fit without owning a machine shop!
... Variances in dovetail widths and heights, (on both parts) don't help the search much either?...
I have found that, blades for artillery and Navy Lugers are a bit taller than standard, but much pricier as well... doesn't help the shooter much unless you can rob one off of another unit or parts gun, accumulated along your journey...
Mauser K98 sights are too low... and if you use a custom blade from Brownells, you have to completely profile and shape with the tools at hand... small flat file and small three corner file as well... And, it is a time consuming task..
The easiest sight to reshape and might just have the height you need is a #4 P.38 sight... I just recently did one of these for a GTS/T-4 barrel and the results were encouraging... All I did was file both sides so to end up with a sharp point... more sharp then the Luger was originally...
Marbles used to make a #27 gold bead sheared blade, but they were pretty low as I remember?...
That's the limit of what I know so far! And the search continues... Best to all, til...lat'r....GT....
