I used a Telstar and laser mix to get the length of column (Telstar) with laser uni joint at the bottom on a Morris minor last year. The top spline is so close to MK1 escort steering wheel spline its not worth splitting hairs over.
The Telstar column has two bolts that mount the pivoting legs to the bulkhead at the bottom, they allow the bulkhead to move up or the column to move down in an impact, thus a collapsible column. The top has bracket that mounts to the dash.
Take the measurements of where you want the wheel/column from dash mount position and measurement from top mount to floor joint, then take a ride to the wreakers and see what you find.
might also pay to measure diameter of rack spline and extension length, depending on how you want to attach column shaft to rack spline.