Where to buy/find empty Novolog pen

I recently switched from my Omnipod to MDI to save money. I have vials and syringes, but I am interested in refilling a pen for specific times (going out to eat or at night in bed).

How can I pick up an Echo or similar pen for these purposes? Anyone have one lying around they would donate?

Humalog Kwikpens are disposable, but they can be refilled:

And you can purchase a box of 5 Kwikpens for $89 from Mark’s Marine Phamracy:

You can reuse the heck out of them. $90 worth of pens would last you until there is a cure.