In many, if not most, instances you can retrofit an electric ignition type of burner in place of the pilot one with little difficulty. This is easier than retrofitting the existing pilot burner itself because of the integrated flame controls. WP/KM are particularly easy because the burners are almost completely interchangable among almost all dryers they ever produced.
In a similar fashion, you can convert some dryers from electric to gas easily using a few "donor" parts. (Gas to electric is somewhat more difficult and mainly a wiring job.)
Note that there are several different types of electric ignition systems out there, particularly on the earlier (50's/60's) dryers. Later ones, produced from the '70's and thereafter all use the boring, but reliable, hot surface ignitor. I personally prefer the vibrating contact sparkers that were popular on the sixties machines--no waiting for them + they have a better entertainment factor. I hate to wait!
Several different types of retrofit kits are available for pilot burners and are made by White Rodgers, Robertshaw, Johnson Controls, Honeywell and others. I have a couple of them here--if you are interested I'll go dig them up for specifics.
Joe