Air tight door for amateur arch build

[maxmaple]

Hi everyone.
I am working on plans for my first arch build. It will be something along the lines of the leader half-pint, but maybe a full 2x3. I am a novice welder and don’t feel comfortable making my own door for the arch. (Needless to say I will be buying the pan.) I thought about buying a barrel evaporator door from Amazon and making the venting/ash door below it. I would prefer a cast iron door and vent kit similar to the one found on half-pints. Does anyone know where I can get something similar to that pre-manufactured all in one door and ash cleanout kit that comes with the half-pint?
Any other creative solutions would be appreciated.
Max

[maple flats]

Check the larger dealers, some may have those doors as replacements. In fact, Leader offers air tight fronts (quite pricey) to change a regular arch into an air tight, others may also offer similar ones.