Thanks for the suggestion, Walter. No, none of the six witnesses
available to me has the form with r; four read buḍanaṃ/vuḍanaṃ,
while two read vujhanaṃ (or possibly ṣujhanaṃ). But
perhaps buḍ/vuḍ and bruḍ/vruḍ could be variant
forms? (Both seem to have the meaning 'cover'.) I confess I've
never, to my recollection, come across either before.