
Most glyphs from existing fonts do not match and would need a bit of manual tweaking. I did the glyph manipulation per button directly in Coreldraw, after converting from the closest matched font I could find to curves. I initially tried to use Inkscape for this (I was initially insisting on a free product) but in the end gave up and succumbed to Corel and used the free Coreldraw demo to finalise my design.
This resulted in WP34S above key which is the above key emulator graphic and similar to my own prints of the WP34S key stickers and above key labels.
The X<>Y button that you refer to was I made in the same process. In my opinion, editing the curves in Corel is a solution that will get you to your intended copy of the HP key.
If important, I could check what my starting font was for this one, but it is a Pages file, and must first return home to my Mac to check that.