local Items = {
[25]={12345,"chests",11291,15},
[57]={23456,"boots",11291,10},
[2734]={34567,"heads",11291,5}}

-- Structure:
-- [intid]={itemid, classidtoenchant, itemidtocost, amount}

...
... your code
...

if Items~=nil then
    for k,l in pairs(Items) do
        local name = WorldDBQuery("SELECT ´name1´ FROM ´items´ WHERE entry = "..Items[v][1]):GetColumn(0):GetString()
        pUnit:GossipMenuAddItem(4, "Create a scroll to enchant your "..Items[l][2]..".      (Costs "..Items[l][4].." "..name..".)", Items[k], 0)
    end
end

...
... your code
...

if Items~=nil then
    for n,v in pairs(Items) do if intid==n then
        if player:GetItemCount(Items[v][3]) >= Items[v][4] then
            player:CastSpell(32990)
            player:RemoveItem(Items[v][3], Items[v][4])
            player:AddItem(Items[v][1], 1)
        else
            local name = WorldDBQuery("SELECT ´name1´ FROM ´items´ WHERE entry = "..Items[v][1]):GetColumn(0):GetString()
            player:SendBroadcastMessage("You do not have enough "..name..".")
        end
    end end
end


So if I would now look at the gossip screen of the NPC, I would see 3 menu items I could pic:

Create a scroll to enchant your chests.      (Costs 15 Wood.)   --> adds item 12345
Create a scroll to enchant your boots.      (Costs 10 Wood.)    --> adds item 23456
Create a scroll to enchant your heads.      (Costs 5 Wood.) --> adds item 34567