Any question answered...

Dumb question, need to convert from drop bars to moustache or similar to give more upright position. Bought a yepp mini stem mounted kids seat and with a Surly LHT the head tube angle is so slack it puts the seat right in my lap, and I'm riding a 64 cm frame. Currently using shimano sora index shifters, xtr long cage RD, generic shimano FD.
What sort of trigger, thumb or other shifts will work with swept back, moustache or any other type of bar that's going to give me a bit more room and work with current set up? Also need a set back post anyway so that'll help a bit.

Any help muchos appreciated.

If you go with bar end shifters make sure the handlebar has the inner diameter to accommodate them, many are too small.