Cello String Gauges

Howdy.

Would like to tune one of my basses like a cello. I have picked the cello up again and love the open chords that come from open fifth tuning. Short of measuring the strings on my actual cello (which are now already stretched, is there a set of gauges anyone would recommend? As many of you know, traditional cello strings are sold in light, medium and heavy, thus un-gauged.

Thanks rg