Correct Figured Bass signs (slashed and crossed numbers)

[Nils]

Hello,

I need correct baroque figured bass signs not the modern equivalents which 
Lilypond provides.

For example the slashed 6 where the slash is only in the upper part or the 
slashed 4 where the slash goes vertically through the right side of the 4, 
creating a "4+".
http://www.musiktheorie-aktuell.de/tutorials/regola/Hahn_petiteSixte.png . 6 in 
the lower row, 4+ in the upper.

There are other signs like this, but if anyone knows at all what I'm talking 
about he or she will surely know the rest.

Anyone created such a set? If not, how can I do it on my own? (Publishers will)

Nils