I managed to fix it myself.
a couple more places called me back.
basically for stuff like this they don't really provide an estimate.
you get an hourly rate, with a min call out charge, and then in 15 min increments after that.
The cheapest was 100 bucks and hour for the first hour. then 150 an hour.
the rest started at 125 to 150 an hour right off the bat.
I managed to dig around it further, and discovered it was 3/4 inch pipe into a t that had a reducer on the side I could see, down to 1/2 inch.
That chuck was 1.10 inch around.
A 3/4 cap is 1.05 ish.
I wallered out the cap a little and buffed the t some till they fit together.
then I had to cut the root that was right on top of it, that prevented me from getting the cap on straight.
cut a little half moon shape out of it.
Anyway it is patched up and not leaking. and I got around to replacing 5 other heads that weren't working right.
now I have another 10 to go.