I guess the quest to complete in order to obtain the fist from grando is.....gathering uuuh 10 million GP?
Consider Item Level Restriction too.....You will have many, many levels to choose another weapon than what you have seen at grando's....
I can imagine you cannot unsee at this moment, but I suspect you will eventually get into it naturally later in your career.
Have you considered a crafted smithed weapon? Mulrok tradehall has examples and some crafts to sell.
Also, I think, in general, not specifically your cleric character, as a player, you should know about Epic Shop at this point.
In my experience, epic shop is one of the few things in Nordock one needs to be told about by other players or in character, certainly because it lies hidden nowadays.
Visit mulrok tavern, check out the cellars......Bring money too, several tonnes de GP at least.
Cheers and good luck expanding your weapon collection.
Xillie