Ive thought about our lack of decent items too and have thougt up some items that would really feel at home in our armybook, pts cost and text is ofc subject to change, just rate the ideas^^:
sigmarite hammer 35 pts
Arch Lector/warrior priest only
requires 2 hands
+1 str and flaming(see it as a meteorstrike from each blow)
the priest may forfeit the use of a prayer to confer +1 str until the start of your next magic phase
(so an Arch Lector could foefeit both his prayers and gain a total of +3 str and flaming from this weapon)
a little poor texting but you get the gist of it, the priest may channel divinity into the weapon to get extra heavy blows. this gives the priests an option against dispel heavy armies as it cant be dispelled

I have no idea as far as the point cost goes as its really good on an AL but lacking on a WP if you compare it to sword of power...
Sigmarite Armor: 25 pts
priests only(yet again, comfy with the mechanic I thought of)
fullplate armour, 6+ wardsave
the priest may forfeit the use of a prayer to increase the wardsave by 1(to 5+, and to 4+ if an archlector uses both his prayers in this manor)
gives a modular wardsave tacked on to a cheap way of getting fullplate to your priest^^ not nearly as powerful as the hammer but an Arch Lector with both comes out at 60-75pts in items and is really adaptable as it can play hammer or anvil depending on the situation, maybe up the pointcost and make it 5+ ward base so a arch lector could get 3+ just to make him a real anvil^^
Holy water ptscost 25
one use only
can either be used as a handgrenade against undead/daemons(dont know what str is appropriate, 4?) or to make a weapon magic and give +1str and killing blow against undead/daemons for one round of combat
a fun fluff item that would give you an extra edge against daemon/undead for when you need to charge into their bloodthirster/vampire lord with you templar grand master^^
not a needed item but I thougt it was kind of nice^^