Because our mechanics are not that much skilled - to be honest they don't even have proper tools and equipment to do this job. If you can find a learned mech. than doing that is not a problem.
And if i am not wrong there is slight difference between Club and Exex steering column and assembly - exec has a wider steering comb. Any how a learned and really experienced mech. can solve this thing. Keeping in view of availability of such a person in Pakistan i would suggest the best thing is to replace it with Exec - a factory fitted aka problem free hydraulic steering.
These prices are of old/used aka kabuli parts prices not new. Newer ones gona increase the cost to about 35k+ approximately.