I love my Plantation shutters. They keep rooms cool in the summer and warm in the winter and look fabulous year round.

Anything can be done, it's just a matter of cost. For a job that size, I would try a local makerspace if you have one of those in your city. Hopefully there will be an artisan of some kind who can help you with it. Otherwise, maybe call a hipstery reclaimed furniture store and see if they know of a small business or artist who can make something for you.

There are some great comment here, but my take on this would be if you are going custom to take your time and look around. Many designers offer different takes on each person's preference. The colours you have are good but I'd personally would opt for a more warmer cream, with a self print pattern. I would also suggest pinch pleated curtains and not pencil pleat as you have currently, pinch pleated curtains will give you uniformed pleats from top to bottom. In addition to this I would suggest you use blackout linen to prevent light to enter the room, and possibly interlining so that you retain some thermal properties in your fixtures. Having custom made curtains are a lifetime choice for most customers, take your time and don't settle for the first company you come across. The space above your bed i would possibly add a sheer fabric roman blind which is slightly see through but enough to give you privacy if you bedroom is situated on the ground floor. You can also get the a roman blind to match your new curtains if you'd like a more repetitive theme in your bedroom. I would suggest if you do opt for a roman blind, and you are looking for a good qualities add blackout linen. If you would like a rough estimation on what you would be looking at we can assist you so you are aware of what most reputable curtain making specialist charge in this current market.

You can do whatever you like but there needs to be unifying factor such as colour and a cleanness of line. It is important any trims match in material and colour. Best to go with painted shutters. Bear in mind they will be seen from the road so think about any other windows seen from the same position. I have successfully mixed shutters and a drape. Shutters are expensive so get a professional opinion and measure - I went with the top local retailer and they still messed them up and i had a three month wait to get them replaced. All the best.