In my Manjushree-CSX font, I had designed characters like r and l with a small circle underneath to represent ऋ and लृ.  This was the usage in Wackernagel's Altindische Grammatik as seen in the extract below.  

     Since I can no longer use the Manjushree-CSX font today,  I am wondering if there any Unicode fonts that are able to produce such diacritics?  Any suggestions?

Madhav Deshpande