You can very well fit tubeless tyres on your Avenger. Just make sure you get them in stock size.
For front you can use MRF Zapper FY1 and for rear tyre for go for MRF Zapper-Y tubeless. In case you can't find tubeless version of Zapper Y then use Michelin Pilot Sporty tubeless tyres for front as well as rear.
Aman Yadavvia Google
Which tyre i should prefer for my maruti suzuki alto ?
(Tyre size is 145/80 r12)