I need a minimalist homepage vector graphic & buttons for a financial services site

Industry: Business
Design details: The site is for technical payment gateway so the overall look should convey technical and financial services. It should look neat and technical without looking complicated or over designed. We already have a layout for the site so we are just looking for graphics for the following key areas.

1. Homepage graphic based on a camera lens with buttons surrounding it to select different images for the centre of the lens. Images for centre will be photographs so not part of your design. The idea is that the user will be able to hover over these buttons to see different images in the centre of the page and different info for each. Obviously these interactions are not part of your design brief.
2. Top bar buttons to act as links to web pages - with a separate hover over effect (ie. different colour or other effect to discuss).
3. Abstract background or texture in very pale grey shades to add subtle design to the site. This will be used on the home page and all content pages.
Target audience: Business to Business
Ideas for the visual style: Looking for clean, sharp, minimalist grown-up graphics
Things to avoid: Cartoon type graphics, consumer type graphics
Preferred colors: greys and ochre (company colour #CE601C)
Where the design will be used: Website
Extra notes: More design briefs will be provided after selection of the right candidate. We are looking to complete this work by week ending 15th May. We expect a few iterations to get this right but what we are looking for is simplicity over complexity.