Contributing to other mods?

1) I have been working on making a few new items to help game balance and bookkeeping issues, but I don't want to go to the effort of making an entire mod. Is it common/acceptable to offer resources to people working on large-sized mods?

2) The best item I want to make is a good spear. Currently spears are really, really, really underpowered. They have low damage, a bad damage type, use up both hands and there are simply not enough magical spears available in the game compared to other weapon types. Ashideena is available near the very beginning of BG1 and you can't get a spear that does more damage than Ashideena until you get to the City of Caverns halfway through BG2!

my solution:
Heartbreaker +2 (+1d20 damage on critical hit, +5% critical chance)

average damage is 6.55 (before proficiency and strength bonuses)
Varscona average damage is 7.5 (before proficiency and strength bonuses) and you get a hand free for a shield or a second weapon!

This is a massive upgrade over the spears currently in BG1, but it still seems dramatically worse than war hammers and swords. Could I give this spear a bit more power?