And the store doesn't seem too keen on handing them over, so:
Anyone care to take a look and suggest something to take into gold that isn't a shotgun?
I have seen people using level 1 weapons, but I prefer to be able to contribute something to a game that isn't just a revive medal.

...what.
You've maxed everything but URs, many of which you have at least V. You're low on gels, but it's not like you can take all your 17 gels into a single round, anyway. Shotguns are neat but it's not like Arc Pistols, PPRs, Typhoons, Harriers, Black Widows. Javelins, CSRs, Hurricanes, etc aren't gold-viable. With your hours and manifest, I suspect you'd be more useful than many gold randoms w/o any amp at all.
Heck, you'll got 135 Power Amp IVs. Try a Huntress with one for some extremely strong cloaked Dark Channel fun, or an ACA treating Dark Sphere as a slow-moving biotic wallhax grenade. Maybe try a Vanguard w/ a Talon. You've got plenty of options.