Why not do a circuit board layout with the basic "core" parts you need for the control circuit on it, to build around?
Use EasyEDA / JLCPCB and select parts they have in stock and you can have a few boards with surface mount fitted, in a week or so. The cost of small board from them is peanuts.
They list the LT6700 as well as many 311 style comparators,
Use EasyEDA / JLCPCB and select parts they have in stock and you can have a few boards with surface mount fitted, in a week or so. The cost of small board from them is peanuts.
They list the LT6700 as well as many 311 style comparators,