Pace asked:
Due to the Gliders long wings and the problems you mention are there any with fusealage mounted brakes?
Not currently in production. The first production glass glider (the Phoenix, back in the late 50s) had a sort of belly flap which apparently worked OK. Trailing edge airbrakes have been used, which are pure drag devices.
However, as glider performance improved, the difficulties of getting back on the ground also increased. Thus most need to have lift-killing brakes, as Mark1234 noted, to reduce the gide angle from 50:1 to a more manageable 8:1 or so. They've also been found to be most easily manageable for the pilot in practice.
As always in aviation, a trade-off (in this case between performance/handling and potential structural compromise). I think a reasonable one - many more gliders are broken through overshooting than through structural failure from all causes.
Going beyond VNE in a glider is potentially more dangerous than in a short wing a/c because of the risk of flutter - long and flexible wings are ideal for this purpose. Thus Mary's earlier point about pulling G rather than exceeding VNE, as flutter is more likely to break bits off than over-stressing. In extremis only, of course, and you may be unable to re-use the aircraft.