You can get inexpensive reasonable results by fitting a single mini on-on-on DTDP . This gives normal Strat configuration in the middle, Neck pickup added in parallel when forward.Gives you all 3 if you need it . Back gives various series options depending how you wire the switch.In the example below you get bridge,bridge, Bridge and middle in series Bridge in series with middle and neck in parallel, bridge in series with neck.
View attachment 93049
If you do not want the added switch you can get series between any 2 pickups using a single push pull .You do not need a super switch
Hope this helps