Ok thanks to all of you for your answers. I decided to keep riding the bike as is, while keeping an eye on 2nd hand Merckx forks... Well I've just found one, but it seems too big for my frame... I've been looking for information and read that too long a fork was not an issue since one can saw it down to the desired length, but in this case..:
On my bike, the steerer tube of the fork, i.e. the distance between the top of the "T" and the top of the threading is 160 mmm; c/c distance between headsets is 140mm (bike is a 54); the seller says the new forks is 210mm long... The threading might begin well above the top headset, making it impossible to tighten..

Is that possible? Enclosed a picture of the new fork
Thanks in advance for your comments