depends on the size and if you want a real replica made.

If it is a plaque, depending on the size of the plaque and if you wanted it in hardwood and finished or someting like MDF and painted.

If you want a replica, it will also depend on the material used, but will be about twice the price of a plaque.

Obviously if you just want me to cut it and have you paint it, it will cost less.

But let's just take the Gravity Hammer for example

Say if it were 28 inches long, 8 inches wide, and 1.5 inches thick on a plaque

(remember engraving is free for a reasonable amount)
For hardwood, that is going to run about $200
For MDF and paint, about $150
For MDF just cut, about $100

For a full replica, it would be the same height and width, but it would be 3" thick

(remember engraving is free for a reasonable amount)
For hardwood, that is going to run about $375
For MDF and paint, about $275
For MDF just cut, about $200


:edit:

This does not include shipping, but I am sure I could get it to you for a decently reasonable price.