I am very new to sabers but the only ones I have come across with a flat tip are those from Advanced Light Weaponry. Those blades are extremely strong and I guess won't ever have the tips come off since the plug is recessed and locked in, they are not frosted so do have the light in a tube look which you don't get from Saberforges ones.
An idea of what they look like at the bottom of this page:
ALW Options
Otherwise came across this
"TRUE full blade" on another board but don't know if/when/who/how they will become available.