I MIGHT have a solution, it's what I do for egg searches.
It's going to require a lot more work on your part though. Not abuse work, searching work.
I also suggest trying to find a way to make it an international breed, as there are a lot more shinies when you do it that way.
So you go to the captures tab, set the method to Method 5 Standard Seed, Gift Pokemon. Set the min/max IV frame to 8.
Set 3 to 4 of the IV's that you want, I usually do just 3. In this case you could do 4 as you don't need the attacking stat to be all that important. I did 3 just as an example and to get a few seeds very rapidly.
After you're satisfied with how many results came up.
Copy + paste the Full Seed into the main window of RNG reporter after selecting Breeding (BW) / Breeding (BW, International).
Check mark DW only and shiny only.
Set the starting frame to about 40 for now.
After that, look for the correct inheritance from the different parents to yield the correct IV spread you're looking for.