Even with the launch of the "New Series" on Disney+ Hotstar, the original "Old" seasons (Seasons 1 through 4) hold a special place in the hearts of 90s and 2000s kids.
Radaan Mediaworks released a (limited copies) in the late 2000s. You may find listings on OLX or eBay India under “Kana Kanum Kalangal DVD.” Old Kana Kanum Kalangal All Episodes
For now, a complete, pristine box set of Kana Kanum Kalangal does not exist. But the community-driven hunt for is itself a beautiful act of cultural preservation. Even with the launch of the "New Series"