This is totally a long shot but , has anyone ever heard of any type of Mac font that allows for circled numbers or something somebody has used for writing tabs specifically with tapping in mind?

So far I've been putting the right hand taps in brackets

(courier 9pt)
p h t p h t p h t
|-------------------------------|
|--5--8--12--5--8--12--5--8--12-|
|-------------------------------|
|-------------------------------|
|-------------------------------|
|-------------------------------|
1 4 [1] 1 4 [1] 1 4 [1]

...but it takes major time to get the spacing right and check for accuracy, especially when I get into doing multiple finger stuff.
Any ideas on some other way of doing it besides brackets? Like a font that does circled numbers when you press the shift key or something?