Whether there is a "mid-level" armour set for druid I do not know. I suspect that there is as all other classes I am aware of have one. However it is about 5 expansions behind the times and just as a 30's ranger wearing Ivy Etched gear would be feeling a little silly I suspect that you will find the druid equivalent is equally outdated.
One of the features of those old quests was the "rounding" of stats so Warriors got armour with INT and WIS. You would probably find your set increasing helpful stats like AGI rather than the WIS you are probably after.
The alternative that is much more up to date and doable in your 30's is the Twiglet Sea. The spec is quite nice but the quests can be a long affair since each set of components has a "rare" which may be hard to get.
There isn't really anything I could recommend between where you are and 30's. There are some good buys in the bazaar quite cheaply. Shroud of Nature would probably upgrade you and sells for next to nothing. A 22 druid could make that money easily doing mammoths in Everfrost. Your tracking ability will stand you in good stead. The old faithfulls of Spider Silk and animal Hides are also there.
You will be lucky to get much of the Jaggedpine armour at 35 and it is not really worthwhile anyway. For example the Boots are 11ac, 2dex, 5sta, 5sv magic. For this you need to kill a level 45 Potameid guardian who is immune to snare and root and highly resistant to fire nukes
and an underconned 32 rogue similarly resistant to snare and root who runs at SoW speed. Really a mid 40's minimum
There are comparable boots available cheaply on the bazaar - Coterie General boots are quite similar - and other ones better suited to your druid as well.
Armour is not a prime concern to a druid since you should not be getting hit. Your main resource is your mana pool and you should be doing everything you can to improve this with focus items and WIS/Mana items. Many of these can be quested or camped at your level. The easiest and one of the best is
Fine Antique Ring. You might have to buy the Cockatrice beak and Cougar hide at 22 but the benefit is enormous.