I have exactly what you need: https://cdn.discordapp.com/attachments/334352091340472340/914530097032204348/RockyWrench.zip
This was made by Sonikku, but was rejected due to a bug where the cape hitbox for the wrench was way off, which can be fixed by copy-pasting this code at the very beginning of the wrench ext. sprite's .asm file:
print "CAPE", pc
lda #$01 : sta $170B|!addr,x
lda #$10 : sta $176F|!addr,x
Edit: Make sure you use the latest version of PIXI if for some reason you have an ancient version, otherwise this might not work.
--------------------My Mode 0 guide.
My Discord server.
It has a lot of archived ASM stuff, so check that out!