Here is a comparison of some of the companies, and the additional costs for different options. If the cell has a - that means no extra cost, N/A means it's not an option for that company. If anyone would like to add companies or if I was wrong let me know.
View attachment 4253
We do have a weld on version (not on the website as they are not very popular on the 3G) Same options as the bolt on! Good chart my man.