Holland? Go to M5 in Middelburg and buy/rent an M5 High Racer. Waaaaay more comfortable than even the least aggressive TT position.
M5 Recumbents » Models » Carbon High Racer

While that link claims 48.3km/h @ 250W (on the track), I can at least confirm 22.5mph at 200W for a 85kg rider on a Hollish-like flat road course, and sub-5hr centuries are achievable by a duffer.