First off I'm not a appliance technician, but here is some info I found that you may find helpful.
The factory part number for the burner head is 74003965
Click the part number should take you to the AppliancePartsPros order page for more info or you can enter the part number in the search box on the left were it says, "Enter Part Number
At the time of this post APP did not have any photos of the part.
You can see photos of the part at RepairClinic at this URL.http://www.repairclinic.com/SSPartDetail.aspx?s=t-74003965-%3d%3di704033&PartID=704033
Going by the repairclinic
site it looks like the part include the cap and spark electrode.
Being you can order the part I would guess it could be replace.
How easy I don't know, someone with some experience in that area will have to answer that.