There are airlines in the EU that will put you into an OCC program; ie reduced training, provided;

You are current qualified with 500 PIC on type; The EU is type specific. the 737-100/200 won't qualify for EFIS/glass or NG qualification.
Able to pass the JAR medical;
Qualify for a work visa in the country where the airline, or contracting agency is domiciled – an immigration attorney can be helpful;
Pass the Air Law and Air Ops written exams applicable to the country where the airline is based;

Be prepared, however, to pay for your own accommodations during training as generally no pay until line training has either commenced or has been completed.

As the training is self study with the exception of certain general subjects, no cost is incurred by the airline. There is however, a modest amount reduced from your monthly pay to take care of the amortization of the initial and recurrent training. This will vary from airline as well as contractor.

Total time from day one in the class room to the line check ride runs between 1 and 1/2 months to 2 months.

Ring up various contracting agencies for details applicable to the airlines they represent.

Good luck!