Looks to me like it's coming out the top. So you need replacement seals for the exhaust valve or just the whole valve. Possible a clean and grease may work but in my experience co2 seal's don't last long.
Pretty much answered your own question. It's usually someone else starts recommending them not the Op. You should get yourself one, it won't be as good as a TM but it will be metal if that's what matters it ticks your boxes.
With a little bending you can get them to contour properly with those goggles with out reprofiling the edge giving a little extra nose space. Also very easy to cable tie the mask to the goggles to reduce the gap and you have less straps to faf around with.
Yep my now blue tiger top came out like that. You also find desert DPM dyed Lighter green. I read some where dyed for training exercises to differentiate between factions.