I drilled a hole into the business end to hold a hook but after finding some more reference it needs to be a bit larger so the hook can be inserted further. Same with the clips that hold extra hooks -- wasn't sure where they should be holding the hook but this photo indicates it should be a little further up, so they'll get bored out a little more as well. I think the Mattel hooks might be 10-20% too short but they are close enough for me.
And finally here are a couple of super high resolution shots from Collider that are good as a painting/weathering guide:
These are showing up in Michigan at Walmart for $7.97. Walmart.com might tell you if your local store has them in stock. For the price, I am very happy with it.