Enid, you can get jojoba oil on its own (I rate the MV Organics one but it is quite pricey). I'm guessing H&B would be a good place to look (although I'm now losing track of everyone's geography and sensitivities). Do check the label though, I've seen jojoba oil sold where it was mixed with other carrier oils.
I'm only on day 3 with my lactic acid (10%) from TO, it is very, very, gentle ime but it's also leaving me questioning whether it's doing something
. For comparison Sunday Riley Good Genes, a serum/lactic acid treatment, made me sit up and take notice in seconds of use and was a little too full on for me. I've never tried the Clarins Gentle Exfoliator which isn't all that gentle either supposedly but I'm guessing that sits somewhere in the middle of those two.
LRP hydreane light is HA free, and one of those things made by LRP that don't make a lot of sense to me. It's biggest selling point seems to be paraben free, but beyond that I'm left a little
. If it's wheat and sugar causing issues it may be down to glucose intolerance (which tend to go hand in hand with endocrine issues), I'm fine with no (refined) sugar only and favouring complex carbs otherwise my skin would be decidedly more temperamental, especially around the chin area. It really is a nuisance gathering place, I know I harp on about it but lymph drain massage does help a bit with moving along toxins in this area.
Wilting, as suggested before I'd go for the Toleriane Fluid, it has the nicest ingredient list of them all and is good for combo-oily skin.
Aurora, I'm not the biggest fan of neat tea tree oil as I find it too harsh and believe it's recommended for acne as it's a natural antiseptic not decongester, but I haven't ever researched it properly tbh. Since Enid's issues seem to be more to do with dehydration and diet and less with excess oil (it most likely being a side effect of the former) I don't know how helpful it would be to dry it out further, I figure that's asking for more sebum/oil production. The classic solutions like HA, BHA, and glycolic are off the table.
Enid, maybe you can try a bio-yoghurt, oatmeal, and honey DIY mask. You'll get a bit of lactic acid at a lowish pH to see how your skin deals with that, the oatmeal is soothing and moisturising, and honey is hydrating. A mashed banana is often tossed in these recipes too for moisture and hydration, don't really feel it's essential but if you have one laying about, just toss it in for a bit of softening of the skin.