Hi Limpabit
Yes the sva form is downloadable from
www.vosa.gov.uk follow link to forms, you need the SVA1 form, To book your test you need to send you completed application form to Swansea, address is on the form, along with your fee,
You wont get the donor reg if you haven't used the chassis of the donor car in your build and to get a build up inspection booked contact your local DVLA office and arrange an appointment. HTH
Mark.
P.S Sorry DJH but the testers do work for VOSA(formerly Vehicle Inspectorate)